Abstract:Three typical cooling schemes of spent fuel storage pool are compared and analyzed.On the basis of the existing scheme,the optimization idea is established from comprehensively considering the safety,economy and system achievable.Six different cooling schemes for spent fuel storage pool are proposed.After preliminary comparison and selection of multiple schemes,the best scheme is determined.The best scheme adopts double suction and return water pipelines,three rows of cooling circuits and two rows of supporting systems.The cooling water pump of the third train is provided with cross power supply technology to enhance safety.The third train of heat exchanger is used as a public user of the equipment cooling water system for cooling.Analysis and demonstration show that the scheme has high economic efficiency under the premise of meeting the cooling safety requirements of spent fuel storage pools.